一个高难度的图片问题,谁知道用net 将一张jpg的位图,处量图片亮度大小

[zhouxujian]

一个高难度的图片问题,谁知道用net 将一张jpg的位图,处量图片亮度大小,(质量好差已解决)


string filename = localhost.pub.util.getRandomFilename();
string srcFile1 = Server.MapPath("/bookpic") + "/" + filename + "1.jpg";
string srcFile2 = Server.MapPath("/bookpic") + "/" + filename + "2.jpg";
string srcFile3 = Server.MapPath("/bookpic") + "/" + filename + "3.jpg";

Bitmap myBitmap;
ImageCodecInfo myImageCodecInfo;
Encoder myEncoder;
EncoderParameter myEncoderParameter;
EncoderParameters myEncoderParameters;
myBitmap = new Bitmap("G:\\zhouwork\\photo_pic\\101MSDCF\\101MSDCF\\头花\\DSC04251.JPG");
myImageCodecInfo = GetEncoderInfo("image/jpeg");
myEncoder = Encoder.LuminanceTable;
myEncoderParameters = new EncoderParameters(1);

myEncoderParameter = new EncoderParameter(myEncoder,20624);
myEncoderParameters.Param[0] = myEncoderParameter;
myBitmap.Save(srcFile2, myImageCodecInfo, myEncoderParameters);

老是报错呀

[zhouxujian]

说是无效参数

[zhouxujian]

怎么没人回答,难道都没有碰到过这种情况

[龍过鸡年]

报什么错?

[龍过鸡年]

多半是图片无法回写。

[zhouxujian]

怎么没有有回话的呀

[zhouxujian]

很急呀

[greystar]

对Gamma值进行修改

[greystar]

Graphics g=e.Graphics;
Image image=Image.FromFile(@"C:\Documents and Settings\greystar\My Documents\HOWTO\了解 XML 命名空间.files\text.jpg");
ImageAttributes imAtt=new ImageAttributes();

int width=image.Width;
int height=image.Height;

PointF origin=new PointF(width+0,height+20);
SolidBrush sb=new SolidBrush(Color.FromArgb(255,0,0,0));
for(float i=1.0f;i<2.0f;i+=0.1f)
{
g.DrawImage(image,0,0);
imAtt.SetGamma(i,ColorAdjustType.Default);
g.DrawImage(image,new Rectangle(width+10,0,width,height),0,0,width,height,GraphicsUnit.Pixel,imAtt);

System.Threading.Thread.Sleep(1000);
}

[greystar]

上面的示例中你可以看到图片慢慢变亮起来，不知有没有用。

[zhouxujian]

我要的效果就直接处理图片亮度

[zhouxujian]

怎么没有人呀